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5-day forecast / Van Alstyne, TX

TuesdaySunny102° / 78° 1%
WednesdaySunny100° / 77°
ThursdaySunny97° / 77° 1%
FridaySunny99° / 81° 1%
SaturdayMostly Sunny99° / 81° 7%

Heat Advisory in Effect for Van Alstyne as Temperatures Climb - Jul 20, 4 PM

Van Alstyne weather, updated every four hours — local forecasts you can trust.

A Heat Advisory is active for Van Alstyne, TX, with heat index values reaching 108F tomorrow. Current conditions show a feels-like temperature of 104F.

Marlene Ortiz

July 20, 20262 min read

National Weather Service radar for North Texas (KFWS)
National Weather Service radar for North Texas (KFWS)

*As of Jul 20, 4 PM local time.*

Dangerous Heat Conditions Underway

A Heat Advisory is currently in effect for Van Alstyne, Texas, signaling dangerous heat conditions for the region. The National Weather Service has issued this moderate-severity alert, which remains in place until the evening of July 21. Residents are urged to take this warning seriously as temperatures soar.

Right now, the air temperature stands at 97F, but the combination of heat and humidity makes it feel significantly hotter. The current feels-like temperature is 104F. The relative humidity is at 42%, with a dew point of 70F, indicating quite humid air that traps heat. Winds are blowing from the south at 8 mph, with gusts reaching 12 mph, under a clear sky.

Forecast for Today and Tomorrow

Today, the sun will remain out with a high near 99F. The heat index is expected to reach as high as 106F. South winds will be around 5 mph.

The chance of precipitation is low at 6%. As tonight approaches, skies will clear, and the low will drop to near 78F. However, temperatures will rise to around 80F overnight, with heat index values still hitting 104F.

South winds will persist at around 5 mph.

Tomorrow brings even more intense heat. The high will climb to near 102F, with the heat index peaking at 108F. Skies will remain sunny, and winds will shift to the west southwest at 0 to 5 mph.

The chance of rain is minimal at 1%. Tomorrow night will be clear with a low around 81F, though temperatures may rise to 83F overnight. Heat index values will remain high at 106F, with south southeast winds at 0 to 5 mph.

Safety Reminders

Given the active Heat Advisory and the high heat index values, it is critical to stay cool. Hydrate frequently and limit midday exertion to avoid heat-related illnesses. Check on elderly neighbors and those without air conditioning, as the humidity and heat can be particularly dangerous. Keep vehicles parked in the shade and never leave people or pets inside parked cars.

National Weather Service radar for North Texas (KFWS)

Sources

https://radar.weather.gov

https://api.weather.gov

https://open-meteo.com

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Marlene Ortiz

Marlene Ortiz covers weather, storms, and seasonal life across Van Alstyne and Grayson County.

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